Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner

This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage of an assembly made up of a boiler body complying with EN 303- 11) and a forced draught gas burner complying with EN 676, using combustible gases, hereafter referred to as a "boiler". This European Standard applies to a boiler: - with a nominal output not exceeding 1 000 kW. This European Standard does not contain all the necessary requirements for: - assemblies designed as units; - condensing boilers and low temperature boilers; - boilers intended to be installed in the open; - boilers permanently fitted with more than one flue outlet; - boilers fitted with a draught diverter; - boilers intended to be connected to a common flue having mechanical extraction. This European Standard does not apply to living-space dedicated boilers If the boiler body has already been tested with a liquid fuel burner, in accordance with EN 303-1, EN 303-2 and EN 304, only the tests described in annex G need to be performed. In the case of a range of boilers, see annex F. This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H. This European Standard only covers type testing.

Heizkessel - Teil 3: Zentralheizkessel für gasförmige Brennstoffe - Zusammenbau aus Kessel und Gebläsebrenner

Diese Europäische Norm legt die Anforderungen und Prüfungen für die Sicherheit, die Gebrauchsgüte und den sparsamen Energieeinsatz von Zusammenbauten, bestehend aus einem Kesselkörper gemäß den Anforderungen von prEN 303-1 und einem Gasgebläsebrenner gemäß EN 676 - nachfolgend als Kessel bezeichnet - fest.

Chaudières de chauffage - Partie 3: Chaudières de chauffage central utilisant les combustibles gazeux - Assemblage d'un corps de chaudière et d'un brûleur à air soufflé

La présente norme européenne spécifie les exigences et les méthodes d'essais relatives à la construction, la sécurité et l'utilisation rationnelle de l'énergie d'un assemblage constitué d'un corps de chaudière conforme au projet de norme prEN 303-1 et d'un brûleur à air soufflé conforme à l'EN 676 utilisant les combustibles gazeux, appelé ci-après "chaudière".

Kotli za ogrevanje - 3. del: Plinski kotli za centralno ogrevanje – Sestava kotla in ventilatorskega gorilnika

General Information

Status

Published

Publication Date

22-Sep-1998

Withdrawal Date

30-Mar-1999

ICS

91.140.10 - Central heating systems

Technical Committee

CEN/TC 109 - Central heating boilers using gaseous fuels

Drafting Committee

CEN/TC 109 - Central heating boilers using gaseous fuels

Current Stage

6060 - Definitive text made available (DAV) - Publishing

Start Date

23-Sep-1998

Completion Date

23-Sep-1998

Directive

2009/142/EC - DIRECTIVE 2009/142/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 30 November 2009 relating to appliances burning gaseous fuels

90/396/EEC - Appliances burning gaseous fuels

92/42/EEC - Efficiency requirements for new hot-water boilers fired with liquid or gaseous fuels

Mandate

M/066 - Standardization mandate to CEN concerning Efficiency requirements for boilers

M/BC/CEN/89/6 - Standardization request to CEN concerning appliances burning gaseous fuels

Ref Project

SIST EN 303-3:1999 - Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner

Relations

Amended By

EN 303-3:1998/A2:2004 - Heating Boilers - Part 3 : Gas-fired heating boilers - Assembly comprising a boiler body and a forced draught burner

Effective Date

22-Dec-2008

Corrected By

EN 303-3:1998/AC:2006 - Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner

Effective Date

22-Dec-2008

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Standards Content (Sample)

EN 303-3:1999

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kotli za ogrevanje - 3. del: Plinski kotli za centralno ogrevanje – Sestava kotla in ventilatorskega gorilnikaHeizkessel - Teil 3: Zentralheizkessel für gasförmige Brennstoffe - Zusammenbau aus Kessel und GebläsebrennerChaudieres de chauffage - Partie 3: Chaudieres de chauffage central utilisant les combustibles gazeux - Assemblage d'un corps de chaudiere et d'un bruleur a air souffléHeating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner97.100.20Plinski grelnikiGas heaters91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 303-3:1998SIST EN 303-3:1999en01-december-1999SIST EN 303-3:1999SLOVENSKI
STANDARD
SIST EN 303-3:1
...

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This document specifies, the requirements and test methods concerning the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners and are hereafter referred to as “boilers”.
Where the word boiler is used, this is intended to be read as the boiler including its connecting ducts, ducts and terminals, if any.
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b)   that use one or more combustible gases of the three gas families at the pressures stated in EN 437:2021;
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e)   which are declared in the technical instructions to be either a “low temperature boiler” or a “standard boiler”. If no declaration is given the boiler is to be considered a “standard boiler”;
f)   which are intended to be installed inside a building or in a partially protected place;
g)   which are intended to produce also hot water either by the instantaneous or storage principle, as a single unit;
h)   which are designed for either sealed water systems or for open water systems.
NOTE 2   This document provides requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this document, the risk associated with this alternative construction needs to be assessed.
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This document does not cover all the requirements for:
aa)   appliances that are intended to be connected to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance (see Annex AB);
ab)   appliances using flue dampers;
ac)   appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW;
ad)   appliances of the types A, B14, B¬2, B3, B4, B5 and C;
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ai)   boilers intended to be installed in a room with a foreseeable negative pressure relative to the pressure in the flue system;
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ak)   appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gas;
al)   boilers intended to be installed in areas accessible to elderly people and children;
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Add after k):
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This European Standard specifies the common requirements and test methods, as well as the classification, marking and energy labelling of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners or fully premixed burners, and are hereafter referred to as “boilers”.
This European Standard is to be used in conjunction with the specific Parts 2 (Part 2-1 and following ones).
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NOTE For further background information on appliance types see CEN/TR 1749:2014 [1].
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Gas-fired central heating boilers - Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW

SIST EN 15502-2-1:2022+A1:2024

This document specifies the requirements and test methods, as well as the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners or fully premixed burners, and are hereafter referred to as "boilers".
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aj)   surface temperatures of external parts particular to children and elderly people;
ak)   appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gas;
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SIST EN 15502-2-3:2024

This document specifies the requirements and tests methods concerning the construction, safety, fitness for purpose, and rational use of energy, as well as the classification and marking of hybrid units.
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-   an electrical air-to-water heat pump, as a heat generator, which does not have to meet the heat demand in all operating conditions;
-   a control unit (see definition 3.1.10).
A hybrid unit can include the facility to produce hot water, either by the instantaneous or storage principle, the whole being marketed as a single unit.
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d)   where the maximum operating pressure in the water circuit does not exceed 6 bar;
e)   which are classified as a gas-fired central heating boiler;
f)   which are intended to be installed either indoors or outdoors in a partially protected place;
g)   which are designed for either sealed water systems or for open water systems.
This document provides requirements for boilers with known constructions.
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NOTE 2   An example of an assessment methodology, based upon risk assessment and which covers the essential requirements of the Gas Appliance Regulation UE/426/2016, is given in Clause 11.
This document does not cover all the requirements for:
aa)   appliances that are intended to be connected to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance (see EN 15502-1:2021, Annex AB);
ab)   appliances using flue dampers;
ac)   appliances of the types B21, B31, B51, C21, C41, C51, C61, C71 and C81;
ad)   appliances incorporating flexible plastic flue liners;
ae)   appliances designed to become connected to a combined flue duct system.
af)   appliances of the types C(10),C(11), C(12) and C(13);
ag)   C7 appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW;
ah)   appliances intended to be connected to a flue having mechanical extraction;
ai)   surface temperatures of external parts particular to children and elderly people;
aj)   appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gas;
ak)   appliances equipped with an adaptive combustion control function (ACCF);
al)   boilers intended to be installed in areas accessible to elderly people and children.
This document specifies minimum operating requirements which ensure that the products are fit for the use designated by the technical instructions when used for space heating and/or DHW production.
This document is intended to be used in conjunction with:
ba)   the gas-fired boiler, the generic part EN 15502-1:2021 and specific parts FprEN 15502-2-1:2022 and FprEN 15502-2-2:2022;
bb)   the electrical heat pump, EN 14511-4:2018, EN 378-1:2016+A1:2020, EN 378-2:2016 and EN 14825:2022;
bc)   electrical safety, EN 60335-1:2012 , EN 60335-2-102:2016 and IEC 60335-2-40:2018;
bd)   for domestic hot water production, EN 13203-5:2022.

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EN 303-7:2006(Main)

Heating boilers - Part 7: Gas-fired central heating boilers equipped with a forced draught burner of nominal heat output not exceeding 1 000 kW

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This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage for gas-fired central heating boilers equipped with a forced draught burner. These boilers are formed of the assembly of a boiler body and a forced draught gas burner achieved on the production site of the manufacturer, the whole being designed and marketed as a complete boiler. The boiler body shall be in accordance with EN 303-1. The construction of the forced draught gas burner shall be in accordance with EN 676.

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EN 303-3:1998/AC:2006(Corrigendum)

Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner

SIST EN 303-3:1999/AC:2006

TC - Replace Tables 5 and 6

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EN 303-3:1998/A2:2004(Amendment)

Heating Boilers - Part 3 : Gas-fired heating boilers - Assembly comprising a boiler body and a forced draught burner

SIST EN 303-3:1999/A2:2004

Replace the second paragraph by the following text :
"This European Standard applies to standard boilers and low-temperature boilers with a nominal heat output not exceeding 1000 kW and with a water temperature at normal operation not exceeding 105 °C."
Replace the 2nd dash of the third paragraph by the following text :
"- condensing boilers;"
Delete the last but one paragraph of EN 303-3 :
"This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H."

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EN 15502-1:2012/FprA1(Amendment)

Gas-fired heating boilers - Part 1: General requirements and tests

SIST EN 15502-1:2012/kFprA1:2015

Amendment for the addition of ecodesign requirements (Regulation No 813/2013)
and energy labelling requirements (Regulation No 811/2013)
This European Standard specifies the common requirements and test methods concerning, in particular the construction, safety, fitness for purpose, and rational use of energy, as well as the classification, marking and energy labelling of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners or fully premixed burners, and are hereafter referred to as “boilers”.
This European Standard is to be used in conjunction with the specific Parts 2 (Part 2-1 and following ones).
This European Standard applies to boilers of types B and C, according to CEN/TR 1749:2014:
a)   that use one or more combustible gases of the three gas families at the pressures stated in EN 437;
b)   where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;
c)   where the maximum operating pressure in the water circuit does not exceed 6 bar;
d)   which can give rise to condensation under certain circumstances;
e)   which are declared in the installation instructions to be either a “condensing” boiler or a "low temperature boiler" or a “standard boiler”. If no declaration is given the boiler is to be considered a “standard boiler”
f)   which are intended to be installed inside a building or in a partially protected place;
g)   which are intended to produce hot water either by the instantaneous or storage principle, the whole being marketed as a single unit.
This European Standard applies to boilers designed for sealed water systems or for open water systems.
This general standard and the specific standards (see Part 2) provide requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard or a specific standard, the risk associated with this alternative construction will need to be assessed.
An example of an assessment methodology, based upon risk assessment, is given in Clause 11.
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EN 15502-2-1:2012/FprA1(Amendment)

Gas-fired central heating boilers - Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW

SIST EN 15502-2-1:2013/kFprA1:2016

When final draft in CCMC - Double check that a decision (to submit to FV) is taken both by CEN/TC 166 and CEN/TC 109 - See CEN/BT Decision 72/2014

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